On Sunday, authorities traced her cell phone to an empty field behind the Yuba City Walmart. But still no sign of Alycia or even her phone, something friends say she was always on.

Although the missing truck hasn't led authorities to Alycia's whereabouts, there are no indications of foul play.

"No indication of struggles or any indication that anybody was injured," said Lieutenant James Casner with Sutter County Sheriff's Office. "It appears the car got stuck. Someone was climbing out of it. There are footprints walking away from it."

Earlier on Monday, helicopters and sheriff's deputies searched the immediate area in case Alycia had collapsed while trying to leave the orchard. They weren't able to find anything and the search continues. Authorities will return on Tuesday morning.

Anyone with any information about Yeoman is asked to call the Gridley-Biggs Police Department at 530-846-5670.